The law prohibits certain sex offenders from entering school property. That means those whose polling places are at schools can't vote in person.
Indiana does not require sex offenders who were convicted prior to the creation of the registry in 1994 to register.
A proposal approved by a summer study committee would establish a timetable for offenders to petition a judge to be removed from the registry.
The U.S. Court of Appeals for the Seventh Circuit says Indiana does not provide some sex offenders due process to challenge mistakes in the state's registry.
ALCU officials claim the ban violates the first amendment right to free speech.
Under terms of a bill passed by the Indiana Senate Tuesday, some sex offenders would be required to wear GPS tracking devices.